THE BRONX - A new revelation from Mayor-elect Bill de Blasio's daughter is shining a light on something many young people suffer from.

Chiara de Blasio, 19, released a YouTube video on Christmas Eve revealing she has battled depression and substance abuse. She says that when she went to college, she attended class, but alternated between drinking alcohol and smoking marijuana.

Chiara says she needed help and was referred to a treatment center by her therapist.